Slabbing mill assembly



Dec. 20, 1938. J, B T T S ET A 2,140,822

SLABBING MILL ASSEMBLY Filed June 14, 19s? 3 Sheets-Sheet 1 INVENTORS 24a JOHN B; 737'05 "0 BY fauna N M1244.

ATTOR N EYS.

Dec. 20, 1938. J. TYTUS ET 2,140,822

SLABBING MILL ASSEMBLY Filed June 14, 1937 3 Sheets-Sheet 2 O N O N O O O INVENTORS. I

(fan/v B. Eras 0 BY fan 4R0 MfifmLn/v. 0

ATTORNEY.

Dec. 20, 1938.

J. B. TYTUS El AL SLABBING MILL ASSEMBLY Filed June 14, 1937 3 Sheets-Sheet 5 sww u. aru 6 mp M T.# T B 0 En MM w A f Patented Dec. 20, 1938 UNITED STATES PATENT OFFICE Our invention has to do with means for rolling ingots, and in particular with means for rolling ingots into slabs, such as are employed as starting pieces for modern continuous hot rolling processes. In the well known blooming mill practice, a single reversible mill is provided, having a pair of rolls with slabbing portions and edging por- Entrance tables are provided on each side of the mill with manipulative means for the material being rolled. Thus, during the forward and back rolling of an ingot, the material will sometimes be stood on edge for edging passes, and sometimes laid flat for slabbing passes. When an ingot is to be converted into slabs, the'material progressively becomes very much wider than it is thick, as will be understood; On the conventional blooming mill, where the slabs are rolled on all four sides, between horizontal rolls the time lost in adjusting the screw from the slabbing pass to the edgihg pass and back again intermediaterolling operations in the mill greatly reduces the production. Certain other diificulties are also inherent in the conventional practices.

Anobject of our invention is to provide a new rolling organization and procedure which is free tions.

of these defects.

An object of our invention is the provision of a simple arrangement of parts whereby the rolling or ingots to slabs can be accomplished with a greatly accelerated rate of production.

Another object of our invention is a drastic reduction of the range through which the mill screws have to operate.

Another object of our invention is the provision of means whereby while the material is being given a rolling pass the screw may bead- J'usted for the next pass.

Another object of our invention isto provide a slabbing mill with rolls only slightly longer than the ingot width, which is not possible with either the conventional blooming or universal slabblng mill.

These and other objects of our invention which will be set forth hereinafter or will be apparent to one skilled in the art upon reading these specifications, we accompl sh by that certain construc tion and arrangement of parts of which we will now set forth an exemplary embodiment. As to this, reference is now made to the drawings,

wherein:

Figure l is a general plan vi sembly.

Fig. 2 is a sectional elevation taken along the center line of the mills.

SLABBING MILL ASSEMBLY Application June 14, 1937, Serial No. 148,048

'1 Claims. 80-33) Fig. 3 indicates the relation of the pass line to the mill table rolls.

Fig. 4 is 'an elevational view of the slabbing mill.

Fig.' 5 is an elevational view of the edging mill.-

All figures have parts in section; 5

Briefly, in the practice of our invention, we separate the slabbing and edging operations and provide a separate mill for each. The apparatus of our invention comprises a reversible, horizontalroll edging mill, a reversible, horizontal-roll slabbing mill, a power manipulator disposed between the two mills, power operated guiding means upon either side oi? the edging mill, and the necessary tables for conveying the worlr through the various operations.

With the provision of a separate mill for edging and a separate mill for slabblng, each mill is rolling only on its assigned surfaces of the slab, i. e. the slabbing mill is rolling only on the broad, flat surfaces, and the horizontal-roll edging mill is rolling only on the edges. Thus each mill has only a short screw movement for setting for the next ,pass, because it is not necessary to set the slabbing mill for alternate edging passes and vice versa as occurs when a single mill is employed for bothoperations. Moreover, and this is also important, one mill may be set for the next pass while the material is in the other mill. The mills are set far enough apart so that the material is not in the two mills simultaneously.

Yet our organization is as easily controlled as the conventional blooming imll, and is controlled in substantially the same way. Both mills are operated from the same controls. Both. mills rotate in thesame direction at the same time, although. as indicated, the slab .is not in both mills at once. The side guides on either side of the edging -mill are also operated from one set of controls. The screw down motors of the two mills arc er course, connected to separate controls to 40 give the capabilities set forth above. The motorgenerator-flywheel set will be of the conventional type; but it will be seen that driving means for our mill assembly does not require a power rating such as is required to operate two mills doing simultaneous rolling. It need only be great enough to drive one mill under full load plus the 1 friction load of the other mill, which is idle.

It will be understood that the turning of the rolling piece on its side or on its edge is accom- 60 plished by a conventional manipulator, the location of which is between the mills, and that beyond the mills no manipulative means is necessary on either end of the assembly. heyond the mills there is only the conveyor means for movto I w of themill as ing the materialand the guiding means for the edging mill.

To reduce an ingot to the required size, of course, several passes through each mill are required, although the general direction of rolling is indicated by the arrow I, i. e. in Figure 1 the ingot enters from the right and the finished slabs are conveyed away toward the left. In the several figures like parts have been given like index numerals.

The ingot, indicated at 2, is delivered from the soaking pits to the table 3. It is to be rolled into the slabindicated at 4. The correlation of parts in our apparatus will be clear from the several drawings. The'edging mill is shown as having housings which support the grooved edging rolls 6 and I. These may be driven by spindles 8 and 9 from a pinion stand III, which is connected to a reversible motor II. This is most clearly shown in Fig. 5.

The table 3 feeds the edging mill. It is provided with side guide mechanisms of known form indicated at I9. I

There is a slabbing mill having housings I2 with rolls I3 and I I. These rolls are driven by spindles I5 and I6 from a pinion stand I! which is connected with a reversible motor I8. This is most clearly shown in Fig. 4.

Referring to Figs. 1 and 2, it will be seen that between the edging mill and the slabbing mill there is a manipulator table indicated generally at 20. It is also provided with side guide mechanisms 2| for the edging mill. The purpose of the side guide mechanisms I9 and 2| is, of course, to control the passage of the material through the desired portion of the edging mill rolls, as is well understood; and these side guide members will be operated in unison-by the conventional drives which have been illustrated in the drawings but do'not require description. The manipulator table 20 is also provided with manipulator fingers 22, as is conventional in the blooming mill art, the purpose of these fingers being to turn thematerial. being rolled, so that it may be caused to rest either upon its side or upon its edge. These manipulator fingers are powered also by the conventional blooming mill mechanism for the purpose, which again has been indicated in the drawings but has not been described.

Beyond the slabbing mill there is the table 23. tablemay be provided with fixed side guides The various tables 3, 20 and 23 may be made up of power driven rotating rolls as is usual in 55 blooming, mill practice, these rolls serving to propel the piece and feed the mills or carry the piece from one mill to another. The drives for these rolls will, of course; be reversible.

In operation an ingot from the soaking pits is delivered onto the table 3, positioned by means of the side guides I9 and sent through the edging mill for an edging pass. It is delivered from this pass onto the table 20. There it may be manipulated so as to cause its unrolled faces to be located horizontally, whereuponit is sent through the slabbing mill-for a side rolling pass and is delivered onto the table 23. Next this table may be reversed and the piece given a slabbing pass through the slabbing -mill, being delivered to the table 20. On this table it is manipulated so that it will rest upon its edge, then it is positioned by the guide means 2I and is sent through the edging mill for an edging pass, these operations being repeated as will be readily understood by the man skilled in the art; until the ingot has ingmill. w

been reduced to slabs of the desired size. It will be understood that this particular sequence of operations is exemplaryonly of those which may be carried out with the assembly of apparatus herein above described, which assembly is quite flexible in its operations. 'When'the ingot has been reduced to the proper size, the'material is delivered upon a run-out table or conveyor 24a.

In g. 3 the relationship of the grooved pass in the edging roll I to the top of the rolls of the tables 20 and 3 is indicated. The dimension A is equal to one-half of the maximum edging reduction. This marks a considerable improvement over the usual procedure. 0n conventional blooming mills, due to the fact that the bullhead pass indicated at l ismuch higher above the table (as indicated by the dimension marked B), it is difficult to maintain the table rolls next to the mill rolls. i r

The conventional type of blooming mill controls may be used with this assembly of apparatus. The manner in which the various assemblies are connected up to the several controls has been described hereinabove, and will be clear from that description to the skilled worker in the art, for which reason, special illustration has not been attempted herein.

It will be understood that modifications may be made in our invention without departing from the spirit of it.

Having thus described our invention, what we claim as new and desire to secure by Letters' Patent is: c

1. In a device for reducing ingots, the combination of a horizontal-roll edging mill and a horizontal-roll fiat rolling mill arranged in tandem, means intermediate said mills for turning a workpiece through substantially. 90, and feeding means for said mills, said mills and said feeding means being reversible.

2. In a device for reducing ingots, the combination of a horizontal-roll edging mill and a horizontal-roll fiat rolling mill arranged in tandem, means intermediate said mills for turning a work piece through substantially 90, and feeding means for said mills, said mills and said feeding means being reversible, and controlling means for said mills, whereby said mills are caused to rotate simultaneously and in the same direction.

3. In combination in means for reducing an ingot, a horizontal-roll edging mill and a horizontal-roll flat rolling mill in interspaced tan-' dem arrangement, feeding means for said mills and manipulative means between said mills, said mills and feeding means being reversible and said mills being interspaced a sufiicient distance so that the material being roller is not simultaneously being treated in both, so that said material maybe manipulated between passes through different mills.

mills and manipulative means between said' mills, said mills and feeding means being reversible and said mills being interspaced a sufficient distance so thatthe material being rolled passes through different' mills, and guiding means on each side of said horizontal-roll edging mill, motive means for said mills and means 5. In combination in means for reducing an ingot, an edging mill and a horizontal-roll flat rolling mill in interspaced tandem arrangement, feeding means for said mills and manipulative means between said mills, said mills and feeding means being reversible and. said mills being interspaced a sufficient distance so that the material being rolled is not simultaneously being treated in both, so that said material may be manipulated between passes through difference mills, and guiding means on each side of said edging mill, motive means for said mills and means for operating said motive means simultaneously in the same direction, and for simultaneously reversing said motive means.

6. In combination in means for reducing an ingot, a horizontal-roll edging mill and a horiznta1ro11 flat rolling mill in interspaced tandem arrangement, feeding means for said mills and manipulative means between said mills, said mills and feeding means being reversible and said mills being interspaced a sufficient distance so that the material being rolled is not simultaneously being treated in both, so that said material may be manipulated between passes through different mills, and guiding means on each side of said horizontal-roll edgfor operating said motive means simultaneously in the same direction and for simultaneously reversing said motive means, and separate means for operating the screws of said two mills, whereby while one of said mills is operating upon the work, the other of said mills may be set for its next operation upon the work.

7. In combination in the order named, a rotating reversible table, adjustable side guide means for said table, a horizontal-roll edging mill, an intermediate driven reversible table,

side guides for said table, manipulator meansfor said table, a horizontal-roll flat rolling mill and a reversible driven table, said organization of apparatus in the order named permitting the operations of edge rolling and side or slab rolling in the reduction of an ingot to a slab, to be carried on successively in diflerent mills, whereby neither mill has to be set between rolling operations for the difierence between an edge rolling pass and a slab rolling pass, and whereby each of the mills may be adjusted for its next pass while a rolling operation is being carried on in the other mill.

1 JOHN B. TY'I'US.

EDWARD N. MILLAN. 

